Vulnerability Details CVE-2026-35092
A flaw was found in Corosync. An integer overflow vulnerability in Corosync's join message sanity validation allows a remote, unauthenticated attacker to send crafted User Datagram Protocol (UDP) packets. This can cause the service to crash, leading to a denial of service. This vulnerability specifically affects Corosync deployments configured to use totemudp/totemudpu mode.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 54.8%
CVSS Severity
CVSS v3 Score 7.5
References
- https://access.redhat.com/errata/RHSA-2026:13644
- https://access.redhat.com/errata/RHSA-2026:13657
- https://access.redhat.com/errata/RHSA-2026:13673
- https://access.redhat.com/errata/RHSA-2026:14205
- https://access.redhat.com/errata/RHSA-2026:14210
- https://access.redhat.com/errata/RHSA-2026:14211
- https://access.redhat.com/errata/RHSA-2026:14212
- https://access.redhat.com/errata/RHSA-2026:14213
- https://access.redhat.com/errata/RHSA-2026:14214
- https://access.redhat.com/errata/RHSA-2026:14215
- https://access.redhat.com/errata/RHSA-2026:14216
- https://access.redhat.com/errata/RHSA-2026:19043
- https://access.redhat.com/errata/RHSA-2026:19200
- https://access.redhat.com/errata/RHSA-2026:20916
- https://access.redhat.com/security/cve/CVE-2026-35092
- https://bugzilla.redhat.com/show_bug.cgi?id=2453169
- https://bugzilla.redhat.com/show_bug.cgi?id=2453814
Products affected by CVE-2026-35092
-
cpe:2.3:a:corosync:corosync:-
-
cpe:2.3:a:redhat:openshift:4.0
-
cpe:2.3:o:redhat:enterprise_linux:10.0
-
cpe:2.3:o:redhat:enterprise_linux:7.0
-
cpe:2.3:o:redhat:enterprise_linux:8.0
-
cpe:2.3:o:redhat:enterprise_linux:9.0